Furnace-door opener



(No Model.)

A. H. BALLAGH. FURNACE DOOR OPENER.

No. 419,748. Patented Ja11.2l,1890.

\\ a L I 3 mm M 4 3 UNITED. STATES;

PATENT OFFICE.

ANDREWV H. BALLAGH, OF MACON CITY, MISSOURI.

FURNACE-DOOR OPENER.

SPECIFICATION forming part of Letters Patent No. 419,748, dated January.21 1890.

Application filed May 11, 1889. Serial No. 310,366. (No model.)

1'0 all whom it may concern.-

Be it known that LANDREW H. BALLAGH, of Macon City, in the county ofMacon and State of Missouri, have invented a new and ImprovedFurnace-Door Opener, of which the following is a full, clear, and exactdescription.

This invention relates to furnace-door openers, the object of theinvention being to provide an attachment for furnace doors by means ofwhich the door maybe opened by depressing a treadle, thus leaving thehands of the operator free to throw on coal or rake the fire, a springbeing arranged so that the door will close the moment the pressure uponthe treadle is released, and an attachment being provided by means ofwhich the door may be held open against the tension of the spring whenit is desired to so hold the door open.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures and letters of refer-- enceindicate corresponding parts in all the views.

Figure 1 is a face View of a furnace-door, representing the same as itappears when provided with my improved opening attachment. Fig. 2 is aplan View of the attachment, and Fig. 3 is a view representing the partsas they appear when the door is held in the open position by theattachment above referred to.

In the drawings, represents a furnace.

door that is provided with a latch 11, which engages a keeper 12, thelatch being pivotally connected to the door. Beneath the latch 11, Ipivotally mount a bell-crank tripping-lever 13, which is connected withan arm 14, that is loosely mounted on the door-hinge pintle by aconnecting-rod 16. To the arm 14, I pivotally connect a rod 20, whichextends inward from the'arm to a point marked a, then upward to a pointindicated at b, then laterally over the top of the door 10 to c, andfinally downward to connect with a lever 21, that is rigidly connectedto a rock-shaft 22, said rock-shaft being mounted in a bracket 23, thatis secured to the flooring in advance of the furnace.

To the outer end of the rock-shaft 22, I secure a treadle 24:, thearrangement being such that by depressing the treadle the lever 21 willbe thrown in the direction of its arrow and will carry the rod so thatthe arm 14 will be moved in a proper direction to throw thetripping-lever 13, as indicated by its arrow, (shown in Fig. 1,) whichmovement of the tripping-lever will raise the latch 11 from engagementwith the keeper 12, any continued depression of the treadle drawing uponthe tripping-lever 13 and moving the door to the position in which it isshown in Fig. 3. After the pressure upon the treadle has been relaxed aspring 26, which is coiled about the pintle 15 and bears upon thefurnace-wall and upon the door, will act to return the door to itsclosed position.

In order that the door may be held in the open position, I provide thelever 21 with a pivotally mounted catch 27, which catch, when the leverhas been moved to the position in which it is shown in Fig. 3, may beturned up to engage the keeper 12.

By means of the door-operatin g attachment above described I provide forthe opening of thedoor for a period just long enough to supply thefurnace with coal or to rake the fire, as will be readily understood,and thereby obviate the necessity of opening the door by hand, thenseizing the shovel or other implement, and in finally closing the door,whereby I prevent the checking of the fire and the consequent loss ofsteam.

Having thus described my invention,l claim as new and desire to secureby Letters Patent-=- 1. The combination, with a furnace-door, of atripping-lever pivotally connected thereto, an arm mounted on the pintleof the doorhinge, connections between the lever and the arm, a treadle,a lever arranged to move therewith, and a rod 20, which connects saidlever with the arm, substantially as described.

2. The combination, with a lever 13, arranged for connection with afurnace-door, of an arm 14;, loosely mounted on the pintle of thedoor-hinge, a link or rod connecting the arm and the lever, a lever 21,a treadle connected thereto, and connections between the lever 21 andthe arm 14, substantially as described.

3. The combination, with a furnace-door, of a spring 26, arranged inconnection. therewith, a tripping-lever 13, pivotally connected to thedoor, an arm 14:, loosely mounted on the pintle of the door-hinge,connections between the lever 13 and the arm 14:, a lever 21, a

treadle arranged in connection therewith, and a connection,substantially as described, between the lever 21 and the arm 14:, as andfor the purpose stated.

4. In a furnace-door-operating attachment, the combination, witha lever21, of a treadle 24, connected thereto, a latch 27 carried by the lever21 and arranged to engage the keeper of the door-latch, a spring 26,arranged T0 in connection with the furnace-door, a trippin g-lever 13,pivotally connected to the door, an arm 14;, mounted upon the pintle ofthe door-hinge, connections between the trippinglever and the arm, and aconnection, substantially as described, between the lever 21 I 5 and thearm 14:, as and for the purpose stated.

ANDREW H. BALLAGH. Witnesses:

HAYDEN A; BUTLER, SAMUEL F. TRAMMEL.

